[cairo] Non-antialiased rendering in image surface

[M Joonas Pihlaja]

On Sat, 26 Jun 2010, cu wrote:

> Is there something about non-antialiased rendering that makes it less
> preferred or slower than antialiased rendering wrt image surface?

Yes there is.  The non-antialiased rendering is generally done via an 
A1 format bitmap mask surface and this invokes general composition 
paths inside pixman.  There's no particularly good reason for this I 
think other than "nobody uses unantialiased rendering."

Joonas